The group are scheduled to rally in George Square at the end of March to mark the end of more than a month of demos outside centres in Glasgow.

When contacted by the Record, a representative for 40 Days of Life refused to comment on the fly-posting.

A spokesperson for campaign group Back Off - who support women's rights to access pregnancy advice and abortion centres free from interference and intimidation - said: "Advertising in this way for people to take part in a campaign targeting women seeking confidential medical help smacks of desperation.

"If the aim is to target the parents of young children on the basis that they will oppose abortion it is also misjudged. Those who campaign against abortion often do not understand that the women who have abortions are already mothers, or will often go on to have children later in life.